quad mac isnt worth it....it looks like they wanna get rid of processors before switching to intel-mac. i have G5 dual 2.5Ghz and im a long time mac user just build a 1st PC.
mac is so much easier...and so fast and stable (except for games....doh..) but i have radeon 9800xt 256mb w/ it and plays all games (well..not much games out for mac anyway...). it plays doom3 @ 1024x768 w/ all graphix option to highest setting w/ comfortable FPS. so its no that bad. it just sucks no good games ported to mac...thats y i built PC. but i still love mac and mac is my main comp. pc is just for games..